Q7. What is the stress concentration for shear stress due to torsion at the critical location? (Select Nearest Value) 0.9 1.2 1.3 1.42 1.65 ОООО

International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
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Chapter4: Coplanar Equilibrium Analysis
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Q7. What is the stress concentration for shear stress due to torsion at the critical location?
(Select Nearest Value)
0.9
1.2
О 1.3
O 1.42
O 1.65
Transcribed Image Text:Q7. What is the stress concentration for shear stress due to torsion at the critical location? (Select Nearest Value) 0.9 1.2 О 1.3 O 1.42 O 1.65
The round stepped shaft (diameters d and D) shown below is a design for an exoplanet rover
wheel axle. Assuming the wheel is stuck, a torque from the motor is transmitted to the axle
but it is not rotating. The reaction of the weight of the rover on the ground and the torque
the wheel applies to the ground are represented by the force F acting in the center of the
wheel hub (not shown) at point C. There is a sharp fillet at B with radius r shown below.
Bearings are shown at point A and next to point B. You may assume the bearing at B resists the
bending moment caused by the force F and acts like a fixed reaction.
В
A
L2
L1
T
L3 -
ØD
Ød
R. r
F
SUBMIT ANSWERS HERE:
Paramete
Parameter
Value
Value
SUT (tension)
400 MPa | L1
400 mm
Suc
(Compression)
600 Мра L2
200 mm
Sy
380 MPа L3
100 mm
600 N-m ø d
40 mm
F
0.2 kN ø D
55 mm
R. r
8 mm
Transcribed Image Text:The round stepped shaft (diameters d and D) shown below is a design for an exoplanet rover wheel axle. Assuming the wheel is stuck, a torque from the motor is transmitted to the axle but it is not rotating. The reaction of the weight of the rover on the ground and the torque the wheel applies to the ground are represented by the force F acting in the center of the wheel hub (not shown) at point C. There is a sharp fillet at B with radius r shown below. Bearings are shown at point A and next to point B. You may assume the bearing at B resists the bending moment caused by the force F and acts like a fixed reaction. В A L2 L1 T L3 - ØD Ød R. r F SUBMIT ANSWERS HERE: Paramete Parameter Value Value SUT (tension) 400 MPa | L1 400 mm Suc (Compression) 600 Мра L2 200 mm Sy 380 MPа L3 100 mm 600 N-m ø d 40 mm F 0.2 kN ø D 55 mm R. r 8 mm
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